dâyere-yi (#), parhuni (#)
1) Having the form of a circle.
M.E. circuler, O.Fr. circuler, from L. circularis, from circulus, → circle, + -aris "-ar," variant of → -al, joined to words in which an l precedes the suffix (circular; lunar; singular).
Dâyere-yi, parhuni, from dâyeré or parhun→ circle + -i adj. suffix.
circular magnetic field
meydân-e meqnâtisi-ye dâyere-yi
Fr.: champ magnétique circulaire
A → magnetic field whose lines of force (→ line of force) run around the perimeter of the magnet.
jonbeš-e dâyere-yi, ~ parhuni
Fr.: mouvement circulaire
Motion in which an object moves in a circle at a constant speed. The velocity, however, changes not because the magnitude of the velocity changes, but because its direction changes. The changing velocity creates an acceleration, called → centripetal acceleration. This acceleration results from the → centripetal force.
madâr-e dâyere-yi, ~ parhuni
Fr.: orbite circulaire
The path of a object in → circular motion.
qotbeš-e parhuni, ~ dâyereyi (#)
Fr.: polarisation circulaire
The → polarization of an → electromagnetic radiation in which the electric field vector describes a circle about the direction of propagation at any point in the path of the radiation. Circular polarization is a combination of two perpendicular → linearly polarized waves that are 90 degrees out of phase with each other. Circular polarization may be referred to as "right-hand" or "left-hand," depending on the rotation direction as viewed by the observer.
→ circular; → polarization.
circular variable filter (CVF)
pâlâye-ye vartande-ye parhuni, ~ ~ dâyereyi
Fr.: filtre circulaire variable
Circular band-pass interference filter whose thickness and central wavelength vary along the perimeter. They are used in low-resolution spectrophotometers mainly in the infra-red.
circularly polarized light
nur-e qotbide-ye dâyere-yi
Fr.: lumière polarisée circulairement
Light exhibiting → circular polarization.
innermost stable circular orbit (ISCO)
darunitarin madâr-e dâyere-yi-ye pâydâr
Fr.: orbite circulaire stable intérieur
The smallest → circular orbit in which a particle can stably orbit a → black hole according to → general relativity without the risk of falling past the → event horizon. In other words, the ISCO is the inner edge of the → accretion disk around a black hole. Therefore, characteristics of accretion disks depend on ISCO. The radius of ISCO is calculated to be three times the → Schwarzschild radius (3 RSch). ISCO is closer to event horizon for rotating black hole.
uniform circular motion
jonbeš-e dâyereyi-ye yekdis, ~ ~ yeknavâxt
Fr.: mouvement circulaire uniforme
The motion of an object around a fixed point at a constant angular speed, and at constant radius.